WITH CHECK OPTION

WITH CHECK OPTION is a SQL statement in the Views category. Ensures that any INSERT or UPDATE through the view cannot create rows that the view would not show. The syntax is CREATE VIEW view_name AS select_statement WITH CHECK OPTION;. It returns view with check constraint. A typical example: CREATE VIEW high_value_customers AS SELECT * FROM customers WHERE total_purchases > 10000 WITH CHECK OPTION; -- This INSERT fails: INSERT INTO high_value_customers VALUES (1, 'Bob', 100); -- Because 100 < 10000, view would not show this row A close relative is CREATE VIEW, which creates a virtual table based on a SELECT query. Think of it as a saved query that acts like a table. A close relative is DROP VIEW, which removes a view from the database. Does not affect the underlying tables. A close relative is ALTER VIEW, which modifies an existing view definition. More about this category: Database views — CREATE VIEW, DROP VIEW, ALTER VIEW, materialized views.